What are ways to distort spacetime?

Question

Can a magnetic feild do something to it?
What would a disc of energy do to spacetime?
Please explain

Answer 1

In flat background general relativity (FBGR), the metrics of spacetime are distortions of the Einstein field equations (EFE) solutions to have a flat background spacetime. Along lines of sight, the background spacetime of FBGR is spacetime as viewed by an observer. Mathematically, the metric of a background spacetime is obtained from the metric of a "foreground" spacetime by removing the factors of gravitational time dilation and gravitational length contraction. For a static stationary spherically symmetric (SSSS) spacetime whose EFE solution is ds2 = e2 y d t2 -e2 c d r2 - r2 ( dq2 + sin2 q df2), the distorted metric is ds2 = e2 y dt2 - [ ( d y/ dr ) r+1]2 dr2 - r2 ( dq2 +sin2 q df2 ). The distorted Schwarzschild solution is then ds2 = [(r - 2m)/ r] dt2 - [(r-m)2/(r-2m)2] dr2 - r2( dq2 + sin2 q df2 ). The distorted SSSS metrics of spacetime prohibit entry into black holes, while closely corresponding to those of Einstein's theory in low to medium strength gravitational fields. The predictions of FBGR are potentially testable using binary pulsar systems.
Although it is supported by existing observations, Einstein's general relativity (GR) theory [1,2,3,4] is not without its problems. Among them are the singularities of black holes [5,6], reachable positions at which the math of Einstein's GR breaks down. This leads to the issue of whether Einstein's GR can be modified to eliminate or make unreachable the singularities or even black holes outright while maintaining consistency with current observations. In this article, a theory called flat background general relativity (FBGR) [7] which achieves these goals is presented.
In FBGR, the metrics of spacetime are distortions of EFE solutions in the direction of changing gravitational time dilation and length contraction (GTDLC) such that their background metrics are flat. (Gravitational length contraction exists for parallactically measured distances, as described in appendix A.) The postulates of FBGR are:
Postulate 1:
The direct observations of an observer defines a background spacetime which
is flat,
has incremental temporal intervals which are measured using the local standard clock as extended to distant positions by using the Einstein synchronisation procedure [8],
has incremental spatial intervals which are measured along a line of sight using the local standard rod as extended to distant positions by using parallax along a local and locally measured baseline, and
against which GTDLC occur.

Answer 2

All matter/energy distorts spacetime. A magnetic field contains an energy density, whatever a "disc of energy" is would also do it. In other words, just about everything does. The effect however, is extremely minute except for large masses. The equation of General Relativity is

G(ab) = k*T(ab)

G(ab) is the Einstein Tensor that expresses the geometry of spacetime, T(ab) is the Stress-Energy Tensor expressing the net effect of all massenergy sources

Answer 3

Check out information on anti-matter and black holes.

Answer 4

wow complicated